Chain guard



FIG. 1 is an outside (front) perspective view of a chain guard installed on a front chain wheel in accordance with my new design;

FIG. 2 is an outside (front) elevational view of the chain guard in accordance with my new design;

FIG. 3 is an inside (back) elevational view of the chain guard in accordance with my new design;

FIG. 4 is a top plan view of the chain guard in accordance with my new design;

FIG. 5 is a bottom plan view of the chain guard in accordance with my new design;

FIG. 6 is a left side elevational view of the chain guard in accordance with my new design; and,

FIG. 7 is a right side elevational view of the chain guard in accordance with my new design.

The broken line showing of environment (front chain wheel) in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a chain guard, as shown and described. 